Can't read or write to the NAND, but could before testing

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cheezy102

Full Member
Jan 17, 2010
95
0
Birmingham, UK
www.360flash.co.uk
I just finished installing my Nand-X kit. I have a Xenon with CB 1903. Everything went ok (dumped nand, installed xbr) but when I tested I got E79. So I went back to nandpro to reflash the orig.bin (as suggested in another thread) but now I get "Could not detect a flash controller."

I don't understand why am I getting this error now. I could read and write to the nand before. My soldering skills are awfull but if I could read and write to the nand before then surely I still should be able to.

Any help would be greatly appreciated
 
M

M AzeeM K

VIP Member
Nov 20, 2009
2,096
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Madinah-al-Munawwara, Saudi Arabia / Karachi & Isl
cheezy102 said:
I just finished installing my Nand-X kit. I have a Xenon with CB 1903. Everything went ok (dumped nand, installed xbr) but when I tested I got E79. So I went back to nandpro to reflash the orig.bin (as suggested in another thread) but now I get "Could not detect a flash controller."

I don't understand why am I getting this error now. I could read and write to the nand before. My soldering skills are awfull but if I could read and write to the nand before then surely I still should be able to.

Any help would be greatly appreciated
Click to expand...
Restart your PC and try again to read/write the NAND. Also do a power cycle of the Xbox360 just to be on the safe side.

As for the E79, it means that there is some problem with the soldering of the JTAG part. Post some High Resolution pictures so that we can have a look at them and advice you further in this matter.

By the way, did you try the different resistor settings on the JTAG QSB?
 
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cheezy102

Full Member
Jan 17, 2010
95
0
Birmingham, UK
www.360flash.co.uk
Thanks for the reply. Yes tried the different resistor settings. Also I tested the solder joints with a multiimeter and they look ok. I tested by putting one wire from the multimeter on the solder on the bottom of the motherboard and one wire on the qsb on the top of the board. Is that a good way to check?
 
M

M AzeeM K

VIP Member
Nov 20, 2009
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Madinah-al-Munawwara, Saudi Arabia / Karachi & Isl
C

cheezy102

Full Member
Jan 17, 2010
95
0
Birmingham, UK
www.360flash.co.uk
I have my orig.bin here. Could somebody take a look please? I'm not sure what to look for to tell if its corrupt. I made 3 dumps and they all looked identical in a hex editor. Thanks again for the help.

http://www.filefactory.com/file/b2hd0f8/n/orig3.bin
 
manwithoutname

manwithoutname

1
Jun 4, 2010
3,080
0
You should use NandCompare to compare you NAND dumps ..
 
manwithoutname

manwithoutname

1
Jun 4, 2010
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If there are ZERO non matching blocks then the dump should be fine. But I would like to see a high resolution picture of your soldering job. 99% of the time it's a soldering issue.
 
M

M AzeeM K

VIP Member
Nov 20, 2009
2,096
0
Madinah-al-Munawwara, Saudi Arabia / Karachi & Isl
manwithoutname said:
If there are ZERO non matching blocks then the dump should be fine. But I would like to see a high resolution picture of your soldering job. 99% of the time it's a soldering issue.
Click to expand...
Since he is getting the "Could not detect a flash controller" error, I would say that there is probably some problem with his soldering.

Obviously, a High Resolution of the soldering will help us figuring out the problem.
 
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C

cheezy102

Full Member
Jan 17, 2010
95
0
Birmingham, UK
www.360flash.co.uk
Sorry guys havn't got a decent camera. My soldering is bad but it was working fine up until I tested it. I dumped the nand before JTAG install and wrote to the nand after. It was only after I tested and got e79 that I could not read or write to the nand anymore

Can a bad JTAG solder point stop you reading the nand? I've only been going over the NAND solder joints because I assumed that it must be one of these if I couldn't read the nand
 
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manwithoutname

manwithoutname

1
Jun 4, 2010
3,080
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The JTAG part has no effect what so ever on the NAND reading or writing, that's why you can read and write any 360 NAND without having JTAG connections made.

Bad soldering can come off. But to be honest without us seeing what it looks like we can't help you much more. It's like asking a doctor to diagnose a patient without seeing them ...
 
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